Issue
Unable to arm the system and the user code is valid.
Solution
There is a zone that may be faulted. Check all zones on the system.
If an AC failure exists, you must force arm the system. Enter the arming sequence, and then press the bypass key during the 5-second beep.
Part numbers DS7400X, DS7400, DS7400Xi, DS7400XIVER2, DS7400XIVER3+, DS7400XIVER4+, DS7447